"Wrong slider" error in jquery replace image

Q: When I upload a slideshow to one of my websites where i use wowslider through the wordpress-plugin, I just get a error-message saying "Wrong slider". On this website, I use version 3.4.1 (swedish) of wordpress, version 2.2.3 of wowslider and version 2.5.3 of the wowslider-plugin.